Yep, you even can have not any wallet (installed) at that moment - but only you need is the Etherium Blockchain adress (public adress, to which you also have you own private key - password)
Yep, you even can have not any wallet (installed) at that moment - but only you need is the Etherium Blockchain adress (public adress, to which you also have you own private key - password)